package net.nchelluri.projectEuler.problems.p1to10;
public class Problem8 {
	public static void main(String[] args) {
		final String testAgainst = "73167176531330624919225119674426574742355349194934"
				+ "96983520312774506326239578318016984801869478851843"
				+ "85861560789112949495459501737958331952853208805511"
				+ "12540698747158523863050715693290963295227443043557"
				+ "66896648950445244523161731856403098711121722383113"
				+ "62229893423380308135336276614282806444486645238749"
				+ "30358907296290491560440772390713810515859307960866"
				+ "70172427121883998797908792274921901699720888093776"
				+ "65727333001053367881220235421809751254540594752243"
				+ "52584907711670556013604839586446706324415722155397"
				+ "53697817977846174064955149290862569321978468622482"
				+ "83972241375657056057490261407972968652414535100474"
				+ "82166370484403199890008895243450658541227588666881"
				+ "16427171479924442928230863465674813919123162824586"
				+ "17866458359124566529476545682848912883142607690042"
				+ "24219022671055626321111109370544217506941658960408"
				+ "07198403850962455444362981230987879927244284909188"
				+ "84580156166097919133875499200524063689912560717606"
				+ "05886116467109405077541002256983155200055935729725"
				+ "71636269561882670428252483600823257530420752963450";

		System.out.println(maxOfProductsOfFiveConsecutiveDigitsIn(testAgainst));
	}

	private static Integer maxOfProductsOfFiveConsecutiveDigitsIn(
			String testAgainst) {
		Integer max = null;
		for (int i = 0; i < testAgainst.length() - 5; i++) {
			int product = Character.digit(testAgainst.charAt(i), 10);
			product *= Character.digit(testAgainst.charAt(i + 1), 10);
			product *= Character.digit(testAgainst.charAt(i + 2), 10);
			product *= Character.digit(testAgainst.charAt(i + 3), 10);
			product *= Character.digit(testAgainst.charAt(i + 4), 10);
			if (max == null) {
				max = product;
			} else if (product > max) {
				max = product;
			}
		}
		return max;
	}
}
